Analogue Baby Control is the ideal system which allows you to remain in constant contact with your baby. You can watch and listen to baby whilst he sleeps or plays without disturbing him. It has 2 transmission channels to prevent interferences and luminous��Read more LEDs which indicate the level of noise in the baby''s room. Both devices (parent and baby) can run on batteries (re�chargeable batteries included for the parent device) or plugged into the mains (two adaptors included). Transmission frequen�cy: 40.67-40.69 MHz. Operating range: Approx * 150 m.In good range conditions without any obstacles. This comes in 2 versions: 230 Volt and 120 Vo